CN107831361A - A kind of power measurement instruments - Google Patents
A kind of power measurement instruments Download PDFInfo
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- CN107831361A CN107831361A CN201711019605.5A CN201711019605A CN107831361A CN 107831361 A CN107831361 A CN 107831361A CN 201711019605 A CN201711019605 A CN 201711019605A CN 107831361 A CN107831361 A CN 107831361A
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- power
- chip microcomputer
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- circuit
- power output
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/02—Measuring effective values, i.e. root-mean-square values
- G01R19/03—Measuring effective values, i.e. root-mean-square values using thermoconverters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a kind of power measurement instruments, and it is related to technical field of medical instrument；The power end of power module and single-chip microcomputer is connected, and the input of single-chip microcomputer is electrically connected with power collection module, crystal oscillating circuit, detection circuit respectively, and the output end of the single-chip microcomputer is electrically connected with display module, hot-cast socket special chip respectively；The power output of power output apparatus is gathered by power output wire sensor, then data signal is converted analog signals into by the A/D converter inside single-chip microcomputer, by controlling rule, single-chip microcomputer makes corresponding processing, most result is shown at last, then the power output of system is controlled in the range of requiring by adjusting power；Output stability of the present invention is high, can accurately measure the virtual value of alternating voltage, easy to use and easy to operate.
Description
Technical field：
The present invention relates to a kind of power measurement instruments, belong to technical field of medical instrument.
Background technology：
Power measurement instruments serves primarily in the detection of Medical Devices power output and regulation uses.Due to use now three
Class medical equipment electric knife, argon-gas knife, high-frequency work station, energy platform, two class medical equipment coagulation instrument, gynaecology's leep knife etc.
Equipment is required for power output to be operated, if power output inaccuracy will produce greatly injury, or even nothing to the person
The loss that method makes up.So extremely important is just seemed to the power measurement of this kind equipment.China is this kind of currently without measurement is grasped
The technology of product.Once someone attempted measurement power output with pointer high frequency electric gauge outfit before more than ten years.Due at that time only
It can be measured, then be converted using pointer header, draw general numerical value.Measurement error is 5% or so, pointer error
2% or so, conversion error measures that Extrapolation time is very long, and measurement effect is very low 3% or so.So without extensively should
With.And the power measurement instruments technology that we research and develop employs special integrated chip ZL1899 and designs simple and practical exchange
Voltage effective value detects circuit.The precision of alternating voltage detected value is substantially increased, constant-current source, decoupling electricity are employed in circuit
The measures such as road, negative-feedback make its performance get a promotion.The circuit is applicable not only to the detection of sinusoidal voltage virtual value, also fits
Measurement for Non-sine alternating virtual value.The peak value of the size voltage available of alternating voltage, average value, virtual value carry out table
Show, and in normal circumstances, mostly represent the size of alternating voltage using virtual value, and the measurement of alternating voltage virtual value
By mean value method and two methods of method can be defined.Mean value method is exactly to obtain alternating voltage first by instrument or detection circuit
Average value U from Circuit theory knowledge, the relation between sinusoidal voltage virtual value U and its average value is
Therefore, as long as detecting that alternating voltage average value can be obtained by its virtual value.This fairly simple practicality of method,
But its sine wave AC voltage to standard can just obtain accurately virtual value.In order to make the inspection of Medical Devices more simple
Single, quick, precisely, this treatment to vast patient is guaranteed.The research and development of power measurement instruments technology, which emerge, just seems different
It is often urgent, also embody the market prospects and development potentiality of this technology.
Compared with the pointer high-frequency test gauge outfit e measurement technology of routine, power measurement instruments technology has the advantage that spy
Point：Movement-less part；Zero noise；The feature of environmental protection is good；The operating mode mode of operation of power output point and Current Voltage can be flexibly provided；Can
By property height；Conveniently meet that the detection of each testing agency uses needs.Particularly in recent years in the measurement centre of each rank, respectively
Province medical treatment detection in extensive use.It can be said that power measurement instruments has widened the application of output power measurement technology,
Play other irreplaceable effect of power test mode.In the case of more power output points, the efficiency ratio of power measuring
Pointer power testing method detection efficiency has great lifting, and a power is tested with the power measuring of conventional pointer-type
Output equipment probably needs the time of three hours, and 40 minutes are only needed using power measuring, and the degree of accuracy also improves
10% or so.This just provides fast and reliable application space for Treatment power output equipment in detection, thus increasingly causes
The concern of people.
Existing Treatment power output equipment comes from or so nineteen twenty earliest, so far existing more than 90 years history, and it experienced
The technological change of more than 90 years.It was difficult controllable silicon to be done accurately in the past by the change of the high power transistor of controllable silicon till now
Power output test regulation, with the popularization, application, development of computer technology.The equipment with power output is used extensively at present
The higher single-chip microcomputer of performance makees complete machine control.Also the output accuracy and reliability of equipment in itself therefore are substantially increased, and can
Measurement procedure is carried out to power output point very easily to carry out.But because the fast development of medical industry, power are defeated
Go out the large area popularization of equipment, the equipment of every power output at least needs to measure with the power points of 1,000 or so, function
More dynamic equipment then needs thousands of or even individual power test point up to ten thousand.The measuring method of conventional power output is defeated to more power points
The problem that the equipment gone out carries out measurement gradually highlights, and can not quickly be measured so much power output point in the short time, this
So that the advantage of power measurement instruments is gradually displayed and gradually applied and each measurement centre and medical testing agency at different levels.
The content of the invention：
In view of the above-mentioned problems, the technical problem to be solved in the present invention is to provide a kind of power measurement instruments.
A kind of power measurement instruments of the present invention, it includes single-chip microcomputer, power module, display module, power collection module, crystalline substance
Shake circuit, detection circuit, hot-cast socket special chip；The power end of power module and single-chip microcomputer connects, the input point of single-chip microcomputer
Be not electrically connected with power collection module, crystal oscillating circuit, detection circuit, the output end of the single-chip microcomputer respectively with display module,
Hot-cast socket special chip is electrically connected with；The power output of power output apparatus is gathered by power output wire sensor, then
Data signal is converted analog signals into by the A/D converter inside single-chip microcomputer, by controlling rule, single-chip microcomputer is made accordingly
Processing, most result is shown at last, then by adjust power make system power output control in the range of requiring.
Preferably, the detection circuit includes E/T change-over circuits, comparison circuit, DC regulation circuit, output circuit；
E/T change-over circuits are connected with comparison circuit, and comparison circuit is connected with DC regulation circuit, and DC regulation circuit connects with output circuit
Connect, electricity is converted to temperature signal by E/T change-over circuits by heating effect of current.The chip used in circuit is diode thermometric
Principle.It is the mechanism varied with temperature according to the positive decompression of diode PN junction come detection temperature.
Compared with prior art, beneficial effects of the present invention are：Output is stable high, can accurately measure alternating voltage
Virtual value, it is easy to use and easy to operate.
Brief description of the drawings：
For ease of explanation, the present invention is described in detail by following specific implementations and accompanying drawing.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is silicon, positive junction voltage and the temperature relation schematic diagram of germanium diode in the present invention；
Fig. 3 is cutting effect output function relation schematic diagram in the present invention；
Fig. 4 is the schematic diagram one of output function relation in the present invention；
Fig. 5 is the schematic diagram two of output function relation in the present invention；
Fig. 6 is the schematic diagram three of output function relation in the present invention.
Embodiment：
It is specific below by what is shown in accompanying drawing to make the object, technical solutions and advantages of the present invention of greater clarity
Embodiment describes the present invention.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit the model of the present invention
Enclose.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring the present invention's
Concept.
As shown in figure 1, present embodiment uses following technical scheme：It includes single-chip microcomputer, power module, display mould
Block, power collection module, crystal oscillating circuit, detection circuit, hot-cast socket special chip；The power end of power module and single-chip microcomputer connects
Connect, the input of single-chip microcomputer is electrically connected with power collection module, crystal oscillating circuit, detection circuit respectively, the single-chip microcomputer it is defeated
Go out end to be electrically connected with display module, hot-cast socket special chip respectively；Power output is gathered by power output wire sensor
The power output of equipment, data signal is then converted analog signals into by the A/D converter inside single-chip microcomputer, pass through control
Rule, single-chip microcomputer make corresponding processing, and most result is shown at last, then make the power output control of system by adjusting power
System is in the range of requiring.
Further, the detection circuit includes E/T change-over circuits, comparison circuit, DC regulation circuit, output circuit；
E/T change-over circuits are connected with comparison circuit, and comparison circuit is connected with DC regulation circuit, and DC regulation circuit connects with output circuit
Connect, electricity is converted to temperature signal by E/T change-over circuits by heating effect of current.The chip used in circuit is diode thermometric
Principle.It is the mechanism varied with temperature according to the positive decompression of diode PN junction come detection temperature.Formula is
The formula after derivation：
WhereinAs the voltage equivalent of thermal voltage or temperature, its value is 0.026V. according to relevant information, Is temperature
Degree property is represented by：
The positive junction voltage of diode and temperature are approximately linear relationship, typical silicon, the voltage of germanium diode and temperature
Relation such as Fig. 2.
Virtual value is detected with the fuel factor principle of alternating current, effectively overcome due to AC wave wave distortion to
The error that RMS to DC is brought, special integrated chip is used in the RMS to DC circuit, greatly increases its reliability,
The volume of detection device can also be reduced by improving detection performance.Power measurement instruments has wider frequency bandwidth.And with higher
Accuracy of detection.Precision is up to 1% in DC-50MHz use range.
The selection of detection chip：
For power measurement technology, the quality of power measurement instruments itself is undoubtedly by the effect of left and right output equipment technology
Fruit.So the research for power measurement technology turns into the key component of this technology.
The chip that the detection is used together is the RMS to DC special chip of Japan's production, and the chip is that 14 pin biserials are flat
Flat package.Rational in infrastructure, easy to use, size is small, is easy to product structure design.Both work under AC power environment had been can apply to
Make, can also be applied to be operated under dc source environment after design.The power measurement instruments of the design is existed
Run in indoor alternating current and very severe outdoor environment, therefore the chip is a kind of detection application material of very advantageous
Material.In view of its interference to sensitive electronic equipment, this equipment further provided with special low tension switch power supply, and low pressure voltage stabilizing
Circuit and high voltage stabilizer.
The existing GB 9706.4-2009 in China《Medical electrical equipment, 2-2 parts：High frequency surgical equipment secure private
It is required that》Standard, but also simply define the safety requirements of such product, it is defeated to high frequency using power measurement instruments under this standard
Go out equipment and measure and be up to good effect with power output regulation, Fig. 3 to Fig. 6 is that the waveform of high frequency output equipment is illustrated
Figure.
The system hardware is mainly by Switching Power Supply, output signal receiving module, control system single-chip microcomputer, detecting system module
And display module composition.The system basic functional principle is：To gather high frequency power output signal, then wire is linked by high frequency
Real output value is changed-measures by detection module to be converted analog signals into by the A/D converter inside single-chip microcomputer again
Data signal, by controlling rule, single-chip microcomputer makes corresponding processing, and most result is shown at last, shows power output
The actual power output valve of equipment.
Switch power module：Switching Power Supply is to utilize modern power electronics technology, controlling switch pipe turn on and off when
Between ratio, maintain a kind of power supply of regulated output voltage, Switching Power Supply typically by pulse width modulation (PWM) control IC and
MOSFET is formed.3 conditions of Switching Power Supply：
1st, switch：Power electronic devices is operated on off state rather than linear condition.
2nd, high frequency：Power electronic devices is operated in high frequency rather than the low frequency close to power frequency.
3rd, direct current：Switching Power Supply output is direct current rather than exchange.
It is typically all made up of 3 parts：First, input circuit；Second, output loop；Third, control loop.
Input circuit is by EMI filter circuit, high-voltage rectifying filtering, isolating transformer primary and high-voltage square-wave cutting element group
Into it is directly connected to high voltage with power network；Output loop by isolating transformer is secondary, lower pressure rectifier filter circuit forms, its with
Control loop is all made up of Low-voltage Electronic component；Input circuit is isolated using isolating transformer between the two with output loop
Ensure the person and Low-voltage Electronic device safety, do not only reach high-low voltage isolation so, also accomplish the translation function of high-low voltage.
In past regular tap Power Management Design, output voltage is directly fed back to by generally use after error is amplified
The pattern of input.This voltage-controlled pattern also can preferably play a role in some applications, but with science and technology
Development, the power supply manufacturing industry of the world today uses a kind of scheme for having similar topological structure, the switch of this class formation mostly
Power supply has following characteristics:Output is fed back by TL431 (controllable shunting benchmark) and amplifies error, and TL431 3 ends drive one
The luminous component of optocoupler, and the feedback voltage that the optocoupler photographic department for being in the main side of power supply high pressure is got, for adjusting an electricity
The switch time of the PWM controller of stream mode, so as to obtain a steady dc voltage output.Switching Power Supply and low pressure are steady
The application of volt circuit and high voltage stabilizer causes the special parameter of the safe handling of high frequency power output equipment and continuous electric leakage
Stream and Patient Auxiliary Current etc. are able to accurate measurement and control：
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (2)
- A kind of 1. power measurement instruments, it is characterised in that：It include single-chip microcomputer, power module, display module, power collection module, Crystal oscillating circuit, detection circuit, hot-cast socket special chip；The power end of power module and single-chip microcomputer connects, the input of single-chip microcomputer It is electrically connected with respectively with power collection module, crystal oscillating circuit, detection circuit, the output end of the single-chip microcomputer is respectively with showing mould Block, hot-cast socket special chip are electrically connected with；The power output of power output apparatus is gathered by power output wire sensor, so Data signal is converted analog signals into by the A/D converter inside single-chip microcomputer afterwards, by controlling rule, single-chip microcomputer makes phase The processing answered, most result is shown at last, then the power output of system is controlled in the range of requiring by adjusting power.
- A kind of 2. power measurement instruments according to claim 1, it is characterised in that：The detection circuit includes E/T conversion electricity Road, comparison circuit, DC regulation circuit, output circuit；E/T change-over circuits are connected with comparison circuit, and comparison circuit is adjusted with direct current The connection of economize on electricity road, DC regulation circuit are connected with output circuit, and electricity is converted to temperature by E/T change-over circuits by heating effect of current Spend signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711019605.5A CN107831361A (en) | 2017-10-27 | 2017-10-27 | A kind of power measurement instruments |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711019605.5A CN107831361A (en) | 2017-10-27 | 2017-10-27 | A kind of power measurement instruments |
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| CN107831361A true CN107831361A (en) | 2018-03-23 |
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| CN201711019605.5A Pending CN107831361A (en) | 2017-10-27 | 2017-10-27 | A kind of power measurement instruments |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568334A (en) * | 2018-06-01 | 2019-12-13 | 河南省无线发射传输管理中心 | power amplifier tube detection device and data processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568334A (en) * | 2018-06-01 | 2019-12-13 | 河南省无线发射传输管理中心 | power amplifier tube detection device and data processing method |
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Application publication date: 20180323 |